@TheseusJason I forever have the issue of certain players homing in on me. Almost every round there are 3-4 (usually) who will be up at the top who will intercept or find you regardless of what flag you're attacking. If you get into a firefight with a group, there's is a massive chance this player will be in amongst them and WILL be the one to kill you. I've had some of these players instantly locate me in a random field where I was hidden. Doesn't matter on their rank either. 
I don't even see it as a case of experience either. Sometimes I'll know where people like to hide or situate themselves, or I'll see some tracer fire coming from a particular place (frequently how I'd spot people from aircraft). But these people do this without these elements. They'll see you through smoke and dust.
This is how it is in non-crossplay gameplay, and they feel like bots/console players with regards to their accuracy and ability to tank massive damage. 
When you have to use crossplay to get a game going, the overall experience gets worse,  because then you're dealing with instant headshots from console players (last night I was killed in a heartbeat by console players three times, always with a headshot). You cannot even begin to fire at them before you're dead, and it suggests that all of their rounds are going smack on target. You can hear it sometimes when you get hit. Instead of a hit, a tiny gap, hit, tiny gap, hit, death etc, its just a staccato hit, hit, hit, hit, death. Most egregious if you're running perpendicular to them and you have something that will intermittently obstruct shots, like railings.
But its funny how much these players match bot capabilities. Sometimes bots will just annihilate you with one or two perfect shots regardless of movement or reaction, and that's exactly what these players feel like. I mean I still can't figure how I died instantly, while running, to a half second minigun burst from a Hind racing overhead from right to left, while ascending. The actual amount of time that gunner had to spot me, spool up, fire and put enough rounds in to actually kill me didn't add up with how quickly it happened. I've unloaded a Hind minigun on players before and even relatively stationary the TTK is not quick.